In Reply to: Need some help with auto trans problems posted by R Kieffer on August 02, 2001 at 19:19:17:
I have an 89' 535, tranny runs perfect 95% of time too. Mine happends only when attempting a long uphill grade, and if I am not in the peak powerband ie: my 535 obviously develops the most power in the 4500-6000 RPM range.
Right before a big upgrade, if I put the tranny in "manual mode" and drop to 3rd gear and stay at or above 4500 RPM, it will not error out into "Trans Program" mode. If I let it slip and get out of the optimal power band area, it will error out into "Trans Program" mode.
Luckily for me all I ever have to do is shut off the engine for about a count of 1-2-3-4-5, then restart the engione and it resets. If I shut off the engine for less than a count to five, upon re-starting I am still locked into "Trans Program" mode.
So what is it at the high RPM that eliminates the problem? Is it a pressure deal? Maybe a bad pressure sensor or something?
Any suggestions would be greatly appreciated, yet from the other posts I have seen, I get the feeling there is no common "fix" to this problem. Bummer! :-(